"Oh, don't!" I exclaimed rather sharply. "Even in joke it isn't exactly wise, is it, with people passing all the time?" "Joke!" Mr. Parker repeated. "Precious little joke about it, I can assure you. I dare say it looked simple enough to you, but it was really quite a complicated business. Never mind, Eve has her pearls--and that's the great thing." Then he thrust his hand into his trousers pocket and, without the least attempt at concealment, produced and plumped upon the table in front of him the pearl necklace which only a few minutes before I had seen upon the neck of Lady Orstline. "Look much better on Eve when they've been re-strung, won't they?" he observed. "Gee whiz! What lovely stones they are!" "Put it away!" I gasped. "For Heaven's sake, put it away!" "Why should I?" he asked coolly. My heart suddenly seemed to stop beating. I felt as though the end of the world had come. With the light of triumph ablaze in his narrow black eyes, Mr. Cullen was standing by our table! "Good evening, Mr. Parker!" he said in a tone from which he struggled to keep the note of triumph. "Good evening, young lady!" The hand of Mr. Parker had suddenly covered the pearl necklace. Mr. Cullen was looking steadily toward it. "I trust," he continued, "that my arrival was not inopportune. I haven't interrupted anything, have I--any little celebration, or anything of that sort?" "On the contrary, we are always pleased to see you," Mr. Parker declared warmly. "Sit right down, Mr. Cullen! You'll join us, I trust? We were just thinking of ordering a little supper." Mr. Cullen shook his head. "Perhaps," he advised, "it would be better to postpone that order." "Postpone it?" Mr. Parker repeated, glancing at the clock. "Why, it's late enough now. Good Heavens, is that the time?" Mr. Cullen and I both glanced at the clock at the other end of the room. It was twenty minutes to twelve. The detective looked back with a smile. "You are a past master, Mr. Parker," he said, "in the accomplishment that, I believe, in your country goes by the name of bluff; but there are limits, you know. I shall have to ask you and your daughter and Mr. Walmsley here to accompany me at once to Bow Street. And," he added, suddenly leaning across the table, "move your right hand, please! Don't make a disturbance--for Luigi's sake! If you want trouble you can have it." Mr. Parker raised his hand at once. "Trouble?" he echoed. "That's the last thing I'm looking for." Mr. Cullen smiled grimly. "Ah! I thank you," he said. "A pearl necklace, I see! You must allow me to take charge of this, please." Mr. Parker's look of surprise was admirably done. "That is my daughter's necklace," he explained. "The fastening has become loose." "Exactly!" Mr. Cullen sneered. "I am now going to ask you all three to come with me without any further delay to Bow Street."